题解 | #三角形判断#

while True:
    try:
        num = list(map(int, input().split()))
        num .sort()
        if num[1]+num[0]<=num[2]:
            print("Not a triangle!")
        elif num[1] == num[2]==num[0]:
            print("Equilateral triangle!")
        elif num[0]==num[1] or num[1]==num[2]:
            print("Isosceles triangle!")
        else:
            print("Ordinary triangle!")
    except:
        break